sounds similar to bug 363238, although this is for Intel graphic hardware. Have you tried XAA? Take a look at https://bugs.freedesktop.org/show_bug.cgi?id=21683, too
** Bug watch added: freedesktop.org Bugzilla #21683 https://bugs.freedesktop.org/show_bug.cgi?id=21683 -- X becomes sluggish after only 4 open windows https://bugs.launchpad.net/bugs/356438 You received this bug notification because you are a member of Kubuntu Bugs, which is subscribed to kdebase-workspace in ubuntu. -- kubuntu-bugs mailing list kubuntu-b...@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/kubuntu-bugs
